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A kind of polyurethane adhesive with degradation characteristics and preparation method thereof

A technology of polyurethane adhesives and polyurethane prepolymers, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as endangering consumers' health, solvent residue, slow degradation, etc., and improve production and construction Effects of environment, good degradability, and good adhesive properties

Active Publication Date: 2020-10-30
中山市康和化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the special chemical structure and characteristics of polyurethane adhesives, it degrades slowly in the natural environment. The traditional landfill method relying on microbial degradation has been unable to deal with the growing polyurethane waste, and long-term retention in the environment will bring serious pollution to the natural environment.
[0003] At the same time, the current polyurethane adhesive market is mainly solvent-based adhesives, which have problems such as VOCs emissions and solvent residues, which will not only pollute the air, deteriorate the production and construction environment, but also endanger the health of consumers

Method used

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  • A kind of polyurethane adhesive with degradation characteristics and preparation method thereof
  • A kind of polyurethane adhesive with degradation characteristics and preparation method thereof
  • A kind of polyurethane adhesive with degradation characteristics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The polyurethane adhesive with degradation characteristics provided in this embodiment, the polyurethane adhesive includes A component and B component, A component is a polyurethane prepolymer terminated by isocyanate group (NCO), and B component is a hydroxyl (OH) terminated polyurethane Hydroxyl compound, the molar ratio of isocyanate group (NCO) in component A to hydroxyl group (OH) in component B is n(NCO) / n(OH)=1.2:1, where:

[0042] Component A is made of the following raw materials in parts by mass:

[0043] Oligomer resin 55

[0044] Polyisocyanate 85

[0045] Component B is made of the following raw materials in parts by mass:

[0046] Polyol 70

[0047] Polyisocyanate 24

[0048] Defoamer 0.5;

[0049] In component A:

[0050] The oligomer resin is prepared by reacting polybasic acid with degradable polypolyol and polyol through polyester.

[0051] The polybasic acid is malic acid.

[0052] The degradable polypolyol is polylactide.

[0053] Polyols ar...

Embodiment 2

[0070] The polyurethane adhesive with degradation characteristics provided in this example, the polyurethane adhesive includes A component and B component, A component is a polyurethane prepolymer terminated by isocyanate group (NCO), and B component is a hydroxyl (OH) terminated poly Hydroxyl compound, the molar ratio of isocyanate group (NCO) in component A to hydroxyl group (OH) in component B is n(NCO) / n(OH)=1.5:1, where:

[0071] Component A is made of the following raw materials in parts by mass:

[0072] Oligomer resin 46

[0073] Polyisocyanate 98

[0074] Component B is made of the following raw materials in parts by mass:

[0075] Polyol 85

[0076] Polyisocyanate 16

[0077] Defoamer 0.6;

[0078] In component A:

[0079] The oligomer resin is prepared by reacting polybasic acid with degradable polypolyol and polyol through polyester.

[0080] The polybasic acid is citric acid.

[0081] The degradable polypolyol is polyglycolic acid.

[0082] The polyols ar...

Embodiment 3

[0099] The polyurethane adhesive with degradation characteristics provided in this example, the polyurethane adhesive includes A component and B component, A component is a polyurethane prepolymer terminated by isocyanate group (NCO), and B component is a hydroxyl (OH) terminated poly Hydroxyl compound, the molar ratio of isocyanate group (NCO) in component A to hydroxyl group (OH) in component B is n(NCO) / n(OH)=2.0:1, where:

[0100] Component A is made of the following raw materials in parts by mass:

[0101] Oligomer resin 60

[0102] Polyisocyanate 98

[0103] Component B is made of the following raw materials in parts by mass:

[0104] Polyol 81

[0105] Polyisocyanate 18

[0106] Defoamer 0.7;

[0107] The oligomer resin is prepared by reacting polybasic acid with degradable polyol and polyol through polyester.

[0108] In component A:

[0109] The polybasic acid is aspartic acid.

[0110] The degradable polypolyol is poly-3-hydroxybutyrate.

[0111] The polyols...

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Abstract

The invention discloses a polyurethane adhesive with degradation features. The polyurethane adhesive comprises an ingredient A and an ingredient B, wherein the ingredient A is NCO terminated polyurethane prepolymers; the ingredient B is OH terminated polyol compounds; the mol ratio of the NCO in the ingredient A to the OH in the ingredient B conforms to a formula of n(NCO) / n(OH)=(1.2 to 3.0):1; the ingredient A is prepared from the following raw materials of oligomer resin and polyisocyanates; the ingredient B is prepared from the following raw materials of polyhydric alcohols, polyisocyanatesand anti-foaming agents; the oligomer resin is prepared through polyesterification reaction on polyatomic acid, degradable polyol and polyhydric alcohol; the adhesive has degradable characteristics;meanwhile, in the reaction and preparation process, no organic solvent is contained; no VOCs emission and no solvent residue exist; the green and environmental-friendly effect and safety are realized.The invention also discloses a preparation method of the polyurethane adhesive.

Description

technical field [0001] The invention belongs to the technical field of adhesives, in particular to a polyurethane adhesive with degradation properties and a preparation method thereof. Background technique [0002] Due to its good bonding performance and hygienic safety performance, in recent years, with the rapid development of flexible packaging composite materials, the development of polyurethane adhesives has also been extremely rapid, and new products have emerged one after another, and their performance has been continuously improved. According to market statistics, the output of polyurethane adhesives exceeds 700,000 tons at present, and grows at a rate of more than 15% every year. Correspondingly, the annual discarded polyurethane waste is also constantly increasing. However, due to the special chemical structure and characteristics of polyurethane adhesives, it degrades slowly in the natural environment. The traditional landfill method relying on microbial degradati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/14C09J175/04C08G18/66C08G18/48C08G18/42C08G18/32C08G18/36C08G18/34
Inventor 侯高明陈志国林秋云
Owner 中山市康和化工有限公司
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